|
| |
Sends a message to the desired station.
|
Server |
Y |
Station |
Y |
Interrupt |
21h |
|
Input |
Output |
| AX |
FFh |
80h |
|
|
AX |
| CX |
Message
Length |
|
|
BX |
| DX |
FFh |
Destination |
|
|
CX |
| DS:SI |
Message |
|
|
DX |
Destination:
Node address to send to, 0FFh for broadcasting.
Message Length:
Maximum 2000 for I+, 480 for ARCnet, 1024 for Ethernet
Programming example:
MOV AH,0FFh
MOV AL,80h
MOV DH,-1
MOV DL,3 ; Send to station 3
MOV CX,5 ; 5 bytes
LEA SI,MESSAGE
INT 21h
.
.
.
MESSAGE DB 11h ; The first byte of message must begin
; with this code:
DB "message to be sent"
Notes: 1. This function call does not warrant that the message sent will
be received as correct (or even not received at all) by the
destination station. This is because the sending station will
not wait for "Acknowledgement" from the station of destination.
2. The message MUST have the following format:
CODE = 11h is reserved for users to develop their own
applications on TopWare. Any other codes are reserved
for TopWare.
3. Do not use this call to send messages with a CODE not equal
to 11. Doing so will cause unpredictable results.
*** Refer to function INT 21h with AX=FF9Ah below for receiving. *** |